Cotton-gin



(No Model.) 3 Sheets-Sheet 1. W. DBARBORN.

COTTON GIN.

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Patented Apr. 20, 1886.

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- SSheets-Sheet 2. W. DEARBORN.

ooT'ToN GIN. No. 340,294. Patented Apr. 20 1886.

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W. DBARBORN.

COTTON GIN. No; 340,294. Patejpped Apr. 2o, 1886'.

WITN 55555 INVENTUR H909, ,Qdi/vv. 2

VYMAN DEARBORN, OF BOSTON, ASSGNOR TO F. ROCKWOOD HALL` OF BROOKLINE, MASSACHUSETTS.

COTTON-GIN.

eraerrrcnrrore forming par@ ef Letters Patent no. 240,294, tarea April zo, lass.

Application filed August 1l, ISB-l, Serial No. 140,236. Divided and this application filed May 9.7, 1855.

Serial No. 166,810.

(No model.)

To @ZZ whom, it mayconecra;

Be it known that I, WYMAN DnAnBoRN, of Boston, in the county of Suffolk and State oi" Massachusetts, a citizen of the United States,

have invented anew and useful Improvement in O0tton-Gins, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification in explaining its nature, in which- Figure 1 is a vertical section. Fig. 2 is a plan of the machine. Fig. 3 is ,an enlarged view of the roll. Fig. 4 is an enlarged detail of the wear adjustment for the boxes of the slotted arms. t

This invention is a subdivision of the application for a patent for improvement in picker-feed cotton-gine, led August 11, 1884, and numbered 140,236, and relates to the cot- 2o ton-gin part of the machine therein described.

The drawings illustrate the complete machine, and the parts lettered with large and small letters and numbered letters from A to K inclusive, and. It and S are the parts de scribed in the specification from which this has been separated, and are shown described, and

some ofthe novelties of them patented in Letters Patent of J une 16, 1885, No. 319,964.

The drawings illustrate a picker-feed cot- 33 tou gin, or a cotton -gin in which cottonA is pickedv and cleaned before being fed tothe gin proper, in which the seeds are removed.

The whole machine is described in the other application, and the cotton-gin part only will 3 5 be described in this.

The gin proper, to which this specification relates, may be a roller-gin or may be a beltgin, which latter type of gin was patented t0 Bracket and Dearborn, March 22, 1867, No.

4o 63,136. The belt of the Bracket and Dearborn patent is for the purpose of cleaning cotton, the mechanical equivalent of a roll, and differs from it only in the fact that it may have a quicker, stronger, and longer grasp of the cotton-fiber, and is more thoroughly aerated in each revolutiony and for a longer time than a roll of the same curvature ofthe sharpest curvature of the belt, or even than a roll of the same supericial size; hence what will be 5o said concerning the rollof the gin in this speci` iication is clearly applicable to a belt of the Bracket and Dearborn type. The roll L is situated abreast of the extremity of the feedtable F, and the presser-bar Z is placed somewhat below the roll and between it and the extrem- 5 5 ity of the feed-table. In this space between the roll and the feed-table vibrate the clearers Z2 Z3. Seed-cotton is fed from the feed-table over the lower clearer and presser-bar to the roll, and is caught by the drawingsuriaee of 66 the roll and drawn between the roll Land the presser-bar Z,while the clearer Z2, in its descent, detaehes the seed from the fiber, and the clearer Z, as it rises, lifts the seeds up past the edge of the presser-bar, and so gives the roll 6 1 a better chance to engage with the cotton-ber than it would have were this clearer Z3 not present, particularly when the cotton is short staple or staple of moderate length.

lt is true that clearers having double blades have been heretofore employed; but 'in these the lower blade has been provided with sawteeth, and was adapted to tear or comb the seed from the ber; or, if it were a smootb edged blade, as in the double clearerl patented 7 5 by Greaves i11England,(No.3,526 of 1871,) the two blades were so adjusted that they each passed the upper edge of the presser-bar in their reciprocation about an equal distance, the lower blade going up above the edge ofthe 8;) presser-bar as far as the upper blade in the return-stroke passed below the same point. In this mechanism the lower blade, Z3, has a smooth edge, as the Greaves lower blade had, and it can be seen by the position and throw of the crank (shown and indicated in the drawings) that the lower edge of the upper blade will pass in the downstroke the upper edge of the presser-bar about twice to three times as far as the upper edgeof the lower blade passes 9o the same line in its upward stroke; hence the lower blade of this clearer is not a dofiingblade like the upper one, but only to lift the seeds upward so as to bring the liber attached to them in contact and engagement with the surface of the revolving roll L, and thus give the roll a better hold on the fiber, or a better chance to engage with the fiber.

The work of knocking the seed out against the upper edge of the presser-bar L is done 1o) entirely or almost entirely by the upper blade, Z2, as is customary in roller-gins. This upper blade, P, should be, as usual, adjustable. The cotton thus falls on the roll side of the presserbar Z into a chamber, M, and the clean seeds yfall on the other side of the presser-bar into or toward the chamber' N, the two chambers, M and N, being separated by a partition, m.

Below the clearers ZL l is placed a separator. This may be a screen, O, the meshes of which are not large enough to allow seeds carrying any considerable quantity of cotton to pass through, but are large enough to allow seeds entirely clean to pass through 5 hence clean seeds only will be collected in the chamber N, andthe cotton-carrying seeds will be left above the screen O and such a separator as this should be slightly agitated during the working of the gin, and generally will get agitation enough from the vibration ofthe machine.

Instead of this screen-separator there may be placed in the chamber N a revolving separator, I?, which has a barrel made with open meshes, which meshes are large enough for clean seeds to drop through them past the shaft, and not large enough to allow seeds carrying any considerable quantity of cotton to' pass through. This separator P has upon its exterior wings p, and revolves slowly toward the partition m. It will be seen that seeds clean of cotton will, as they fall, strike either on the open-work barrel or wings p, and if clean will drop through the separator I), and through the chute placed below it (but not illustrated) into a chamber below the separator I?, while the seeds carrying cotton will he carried forward and deposited in that part of the chamber N which is close to the partition m. Thus, if the xedscreen O is used it acts as a stationary separator, while if the revolving separator I? is used, it acts as a mov# ing separator. These separators and their position are described that the whole machine may be understood and the relation of all the parts, but no claim of invention or monopoly is made on them.

In order to provide for wear in the slotted arms Q of the clearers, I line the slots in which the crank-pins of the crankshaft which moves these slotted arms reciproeates in boxes, with gibs q, (which are adjustable to and from the crank-boxes by means of setscrews q', which have their nuts in the frames around the slots, and which have their points resting on the gibsl q, whereby the gibs'q may be forced inward.) and drawing-screws q2. These drawing-screws ql are driven into the gibs, and draw them awayl from the boxes, and in vorder that this draft may be in some degree self-adj usting, I place under the heads of the screws q2 spring-washers qs, of' rubber l or other resilient material-such4 as coiled springs-whereby a constant pressure to draw the gibs away from the boxes is exerted, and avery delicate and fine adjustment may be made.

The drawing-screws 1z may have their nuts in the gibs and be headed at the upper ends, or may have screws cut in their upper ends and nuts run on them above the washers.

The novel combinationhere is the movable gib set in position and held there by spring drawing'screws and by set-screws.

The roll -surface which I prefer (and a similar surface is desirable for the belt-type of ginpif it be used) isa ribbon of rubber-duck but slightly rubbered and wound spirally in several thicknesses about and securely fastened to a shaft of wood or other proper material. `It is better to have the ribbon of several plies of duck, and the edges of the spirallywound ribbon should not abut closely, but should be slightly separated from each other. This is shown in Fig. 3, where L represents the ribbon and L2 the wooden shaft. The workng'surface of this roll is to be a canvas surface rather than a surface of india-rubber; but this canvas surface is to be saturated with ever, interfering with the ordinary roughness of the canvas or duck. This roll, again, as well as the separator, is not a subject of the invention claimed in this application, but is described here as thc best form of roll contemplated for use.

The parts of the invention shown in the drawings and not herein described will be found described in the other application from which this has been divided.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States- 1. The combination, with the feed-table, presser-bar, and roll of a cotton-gin, of the smooth-edged clearers P la, whose motion past the line ofthe upper edge of the presser-bari is regulated to compel and allow the clearer l`I in its downward throw to descend past the said upper edge of the bar Z a distance twice as far, or more, than the clearer Zfascends above the line of the upper edge of said presser-bar l in its upward throw, substantially as described.

2. The combination of the gibs q, set-screws q', drawing-screws q2, and spring-washers q with the slotted clearer-arms and crank-boxes of a cottongin, substantially as described.

\VYM AN DEARBORN.

Vitnesses:

THos. NVM. CLARKE, J. M. DoLAN.

india-rubberl and vulcanized, without, how-- 

